PayPal is an automated online payment system that enables anyone with an email address to make payments from across the country or around the world. Because the system works so well, it is the clearly preferred way to pay for items purchased in eBay auctions. Sending money via PayPal is free, but receiving money may be subject to a fee depending on the type of PayPal account you have.
Although developed and owned by eBay, PayPal is not just for use in eBay transactions. You can also use your account to accept payments via your website regardless of whether you have an eBay account. As part of its Merchant Services program, PayPal offers a free PayPal Shopping Cart system.